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authormarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
committermarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
commita0c4815433ccd57322f4f7703ca35e9ccfa59250 (patch)
treef5213802ec12adb86ec3136001c1c29fe5343700 /mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
parentc73dc01b6de45612b24dc2dd34fba24d81ebf46c (diff)
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Added MesaLib-7.6
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+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+/*
+*/
+
+#include "gluos.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <GL/gl.h>
+
+#include "primitiveStream.h"
+
+Int primStream::num_triangles()
+{
+ Int i;
+ Int ret=0;
+ for(i=0; i<index_lengths; i++)
+ {
+ ret += lengths[i]-2;
+ }
+ return ret;
+}
+
+
+
+/*the begining of inserting a new primitive.
+ *reset counter to be 0.
+ */
+void primStream::begin()
+{
+ counter = 0;
+}
+
+void primStream::insert(Real u, Real v)
+{
+ /*if the space cannot hold u and v,
+ *we have to expand the array
+ */
+ if(index_vertices+1 >= size_vertices) {
+ Real* temp = (Real*) malloc (sizeof(Real) * (2*size_vertices + 2));
+ assert(temp);
+
+ /*copy*/
+ for(Int i=0; i<index_vertices; i++)
+ temp[i] = vertices[i];
+
+ free(vertices);
+ vertices = temp;
+ size_vertices = 2*size_vertices + 2;
+ }
+
+ vertices[index_vertices++] = u;
+ vertices[index_vertices++] = v;
+ counter++;
+}
+
+/*the end of a primitive.
+ *increase index_lengths
+ */
+void primStream::end(Int type)
+{
+ Int i;
+ /*if there is no vertex in this primitive,
+ *nothing needs to be done
+ */
+ if(counter == 0) return ;
+
+ if(index_lengths >= size_lengths){
+ Int* temp = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
+ assert(temp);
+ Int* tempTypes = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
+ assert(tempTypes);
+
+ /*copy*/
+ for(i=0; i<index_lengths; i++){
+ temp[i] = lengths[i];
+ tempTypes[i] = types[i];
+ }
+
+ free(lengths);
+ free(types);
+ lengths = temp;
+ types = tempTypes;
+ size_lengths = 2*size_lengths + 2;
+ }
+ lengths[index_lengths] = counter;
+ types[index_lengths] = type;
+ index_lengths++;
+}
+
+void primStream::print()
+{
+ Int i,j,k;
+ printf("index_lengths=%i,size_lengths=%i\n", index_lengths, size_lengths);
+ printf("index_vertices=%i,size_vertices=%i\n", index_vertices, size_vertices);
+ k=0;
+ for(i=0; i<index_lengths; i++)
+ {
+ if(types[i] == PRIMITIVE_STREAM_FAN)
+ printf("primitive-FAN:\n");
+ else
+ printf("primitive-STRIP:\n");
+ for(j=0; j<lengths[i]; j++)
+ {
+ printf("(%f,%f) ", vertices[k], vertices[k+1]);
+ k += 2;
+ }
+ printf("\n");
+ }
+}
+
+primStream::primStream(Int sizeLengths, Int sizeVertices)
+{
+ lengths = (Int*)malloc (sizeof(Int) * sizeLengths);
+ assert(lengths);
+ types = (Int*)malloc (sizeof(Int) * sizeLengths);
+ assert(types);
+
+ vertices = (Real*) malloc(sizeof(Real) * sizeVertices);
+ assert(vertices);
+
+ index_lengths = 0;
+ index_vertices = 0;
+ size_lengths = sizeLengths;
+ size_vertices = sizeVertices;
+}
+
+primStream::~primStream()
+{
+ free(lengths);
+ free(types);
+ free(vertices);
+}
+
+void primStream::draw()
+{
+ Int i,j,k;
+ k=0;
+ for(i=0; i<index_lengths; i++)
+ {
+ switch(types[i]){
+ case PRIMITIVE_STREAM_FAN:
+ glBegin(GL_TRIANGLE_FAN);
+ break;
+ case PRIMITIVE_STREAM_STRIP:
+ glBegin(GL_TRIANGLE_STRIP);
+ break;
+ }
+
+ for(j=0; j<lengths[i]; j++){
+ glVertex2fv(vertices+k);
+ k += 2;
+ }
+ glEnd();
+ }
+}
+